Transmission mechanism



July 10, 1928.

- J. NEW M ANN v TRANSMISSION MECHANISM Filed pct 26, 1926 2 Sheets-Sheet INVENTOR John (Yew/17am? ATTORNEY J. NEWMANN TRANSMI S S ION MECHANI SM,

July '10, 1928; 1,676,345

Filed Oct; 26, 1926 ZSheets-Sheet 2 INVENTOR 42 36 M 2 I ATTORNEY- Patented July '10, 1928;

lfzronir vnwiaennyor'ennivnenn; ivnwdronirfffl TRANSMISSIONIMECHANISMQ Application filed October 26,1926... Serial No. 144,236.

QMy invention relates to improvements in mechanism adapted to transmit reducedspeed of rotation from a primer moveror planetary gearing which may be driven from any desired-primemover or source ofxpowerp shaft to be driven said gearing .at .re :duced speed, and a second planetarygear-rmg to be operated by said shaft, a driven member or drumr'being connected with. the

i second;named gearing for rotationuof said.

" V hereinafter setforth and then-pointed out in 1 Fig. 1 isa side" elevation of transmission.

drivenmember at speed reduced from} the speed of rotation of said shaft." a My'invention further com-prises novel detailsof improvement that. will be more fully the "claims.

Reference is be had to the accompanye ing drawings forming a part thereof,Where'- mechanism in the form of hoistingapparar tus embodyingmiy inventiong'partly in sec 4 tion online 1, .1', in Fig.- 8;

"Fig; 2 is a longitudin l section on gline '2,

2, in Fig.3;

I m supportor frame-1s shown provided with prime '1Fi'g.;3 -'s a crosssection substantially andilf lglt is asectionfloi line 3', 3, 1n-Fig. 2, -a-modification.aqi y 7 Similar numerals ofireference indicate cor: responding parts in the -several* views.

i ;At' 1 is indicated ag'povver apparatusor m ver w ch may, be any suit e motor,

driven shaft 7", as by a keyat 8; An internal {of the planetary transmission is indicated at 9 inmesh with the pinions- ,4:-.,-A

a bearing-11 Within which the shaft Tris journaled. 1 The support 10 is carried by or provided with asuitable'base mn .T he internal gear 9is-sl1ovvn provided With an an-e and at2 is a drive shaft drivenfby f the; motor andprovidedvvith'a-gear 3 oi a planetary transmission gearing or media 1 'nism The gear 3 is in mesh with one or more Y pinions 410i the planetary Y gearing Whose, gudgeonsorpivots Sare'secured to a espider, or, support '61that is secured toganulai'ydrum' or brakingbsur'face at 18 and said internal gear" is secured to a tubular shaft orwbnshing lt' bymeans ofa-web9 and a key" at -15,Witl1invvhich tubular shaft i tau I. being'shoivn journaled' Within thenbearing i I 14 the shaft? rotative; said tubular shaft 11; Thesh'a ftj'? actuates a second planetary gearinggand-is provided vvith'ageariatlfiin meshwith one ora more pinionslT Whose;

shafts or pivots IS-are journaled in a spider.

orv support 19 thatissecured to or; formedz" with the shaft 16b. The-shafts o r pivots 18" iii are provided with. pinion's JQOQthat are in mesh with lnternal' gear '21'ofathe second planetary gearingshown provided with internal gea'r22is provided with an annular braking surface or drum 24-. 'Theinternal gear 211s to operate'a' driven member Which I-have showniiin: the fo errammes, de-1 tachably secured to, saidiinternalgear-by. 3

screws or they'like 26, aroundwhieh drum a I rope or flexlbleeonnectionQFis adaptedto be Wound for raising and lowering Weighted objects. a The drum 25" is shown l-provided With a pivot or gudgeon 28jyournal'ed in a Anyv suitable braking .means may be pro-@ v dedfor controlling; the rotation 1 of intenna'l: gearing 9 by engagement with: its ibrak in}; surface 1 13 I ihave' illustrated the brake I I band at 30 encircling the surface or drum 13 and comprising two. members pivotally supported-upon-pm 31 carriedby frame 10.

' The free ends ofthebrake bandare to be I drawn togetherfor; gripping" the surface,

same." vA brake band 32, shown comprising two rnem'bers, renclrclese tliebraking surface ofkdrum-"ldand are-yto spreadtorelease the:

ordrnin T24 and is supported" :byzp'in 31 (Flg; 2) AI provide means to operate eith'er f ends of the brake band are providedwith otthe brakeribands atwill; the eonstruction being thessa'mezfor eachband as followsz thefi, 'g. .7 10o)"- "holes slldably receiving rod83 havingahead at'342 at one end bearing against-one member.

of the brake band; (Fig. 3),' a spring 3.35 1

between the. ends of the brake band linemberg serving normally to" spreadfthem to re: lease the adjacent annularisurface'. The rod the gbrake'm'embers, and-the opposite end is is slidablylsupported in bracket 36 and upon said 'odis a slidable sleeve =37, one end 01? which bears against the free end of one of.

llJ

'(U s'upporting web ZQ liavinglhub 23fthat is I shownqournaled'upoirthe bearing 11. The

provided with a head 37*, the outer surface 'of which is shown convex at 37 from the head 37 is a stop38 that is secured Spaced upon rod 33 and is provided with a convex end surface 38 opposing and spaced from the surface 37 of sleeve 37. A Controlling member 39 is pivotally supported between the spaced rods to be rocked, which member is secured upon a shaft 40 journaled in.

bracket 41 secured to the base. Shaft 40 is provided with operating means shown in the form of a leveror arm 42 secured thereto,

I which may be operated in any desired way,

such as rby'chains at 43. The member 39 is provided with wedge-like portionsat 39 on opposite sides, (Fig. 3), adapted to pass respectively between the head 37 and stop 38 ofeither brake band when the member is to accommodate the corresponding rod 33.

"as desired.

tilted by the lever 42 in one direction or another to control the brake band 30or 32 The member 39 is shown provided with recesses 39 on opposite sides when-the member is rocked to one side' or another. -When member 39 is'rocked to the ried by rope 27 at. adesired height orto allow the weight to descendslowly, or as desired. The drum 25 isishown provided with-backstop ratchet teeth 4A adapted to be engagedby dog at pivotally supported uponthe sup-port 10 at 46, whichdog is providedxwithpa projection at 4:7 to permit manipulating it. The dog 45 will be engaged with a tooth 44: when it is desired to stop rotation of drum so as to retaina weight in anelevated position. V

In the modification shown'in Fig. 4 the pinion 20 is omitted and the internal gear 21 is directly 'in meshwith the-pinion 17. The. pinion 17 :is mounted to rotate on the spindle 18 which. is secured to the s ider -19. Theoperation ofthe parts. is simi arto that described, except that the ratio of gear! ing is different. V

The operation may be described as follows: when .shaft-2:.is rotated and the brake band is appliedto the surface or drum 13 the internal gear ,9 and the support or spider 19 will be held from rotation. The rotation oft-shaft .2 will .drive p-inion3 which will cause axial rotation of the pinions 4: which, traveling Within the internal gear 9, .will cause rotation of spider 6, thereby rotating the shaft 7 and thepinion '16. The rotation of pinion 16 will cause axialrotation of the pinions 17, (because the spider 19 is held from'rotation by the gear 9), and the axial rotation of pinions 1-7 will .cause rotation of pinions 20 which will rotate the internal gear 21, wherebythe drum 25 will be rotated for operating rope 27 to raise an object or perform other work. The rotation of shaft 7 bythe planetary gearing 3, 4:, 9, etc. will be at a speed reduced from the speed of rotation of the driving member orshaft 2, in accordance with the ratio of the gearing, and-the rotation of drum 25 will be greatly reduced below the rotation of shaft 7 by reason of the planetary gearing 16, 17, 20 and 21, the ratio of which lastnamed gearing may be such as desired. It will be understood that the reduction of speed of the driven member or drum 25 below the speedofthe driving member or shaft 2 may be such as desired, according to the ratio of the gearin as shown, say, 25 to 1 up to to 1. fiy releasing surface or drum 13 and retaining or retarding the surface or drum 24: the drum 25 may be retarded for lowering an object on the rope, and the gearing may rotate freely during continued rotation .of shaft 2 since the internal gear 9 will be free for axial rotation.- i r In accordance with my invention asimple,

direct acting and inexpensive transmission mechanism is provided for the purpose intended which will be relatively cheap to, manufacture and not liable to get out of order, since the-gears are of an ordinary variety compactly arranged for producing a relatively great reduction of. speed of the driven member or drum 25 from the driving member or-shaft 2 so the lifting poweraof the drum'is large. f I 7 While I have referred to the construction described as a hoistingapparatus .it will be understood that the same may be used for any other desired' :purpose to be operated from the driven member in any desired way.

l-Iaving now described my invention :what Iclaim isz- V V f.

-1. -An apparatus-ofthe character set forth comprising a planetary tranmission mechanism including an internal gear and having a driven shaft concentric with said gear and brake'means for said internal gear, a-second planetary transmission mechanism including an internal gear'and having; one of its gears driven by said shaft for rotating its internal gear, part of said second planetary transmission being controlled with the first named internal gear by said brake means,

driven means-operative by the internal gear of the second named planetary transmission mechanism, and brake means for retardin rotation of the said'driven means, a

2. An apparatus of the characterset forth comprising a planetary transmission mechanism including an internal gear and "pro,- vided with a spider, a shaft securedthereto, and brake means for said internalgear, a second planetary transmission mechanism includingan internal gear .and having a more Pinions driven by the last named gear, S illl spider being connected to said internal gear connectedwith said shaft and havinga spider connected to the internal gear of the first named planetary transmission mechanism, driven means operative by the .in-" ternal gear of the'second named planetary transmission mechanism, and brake means for retarding rotation of the driven means.

7 3. An apparatus of the character set forth comprising a driving member provided with a gear, an internal gear, a spider having one or more pinions in mesh with said gears, a shaft secured to said spider, brake'means I for the internal gear, a gear secured to said shaft, a spider rotative' concentrically respecting said shaft and provided with one or gear, a se ond internalgear driven bysaid last named plnions, driven means operative by said second named lnternal, gear, and

brake meansfor controlling rotation of the driven means. i p

4. An apparatus of the character set forth comprising a driving member provided with a gear, an internal gear,-a spider hav ng one shaft, a spider rotative concentrically respecting said shaft and provided With one or more pinions driven by the last named gear',said spider being connected to said internal gear, a second internal gear driven by said last named pinions, a drum operative by the second named internal gear, and brake means for controlling the rotation of said drum, the first named internal gear operatingidly When the drum is retarded.

' JOHN NEWMANN. 

